Considering how randoms act, they probably were ressing as soon as the respawn timer was off, this way giving more than 1 HK by player. And yes "r3tard", if everyone in your 40man raid hit a player (considering the amount of AoE heals and damaging spells there is in a AH raid, everyone was hit at least one by each raid member), it's added 40 HK for the achievment count when that 1 player dies.
Also again: your raid wiped when another decently PVP geared raid came.

